Scale.



P: P. DUNN.

Patented Feb. 20, 1912.

V 4 SHEETS-BHEBT 1.

76 I! I0 I 1,017,656. Fig- I R N Y. mm M M m V T w H m m F N V. B h .m WW n m mm 0 F. P. DUNN.

I SCALE. APPLICATION FILED NOV, 13, 1908. I

Patnted Feb. 20, 1912.

4 SHEETS-SHEET 2.

INVENTQR. Funk P. Dunn- WITNESSES:

6 7n. n s a! A TTORNE Y.

F. P. DUNN.

SCALE. I APPLICATION FILED NOV. 13, 1908.

Patented Feb. 20, 1912.

4 SHEETS-SHEET 3.

- INVENTOR.

' Fmnk.P.Dunn

WITNESSES:

(0. m vnsfw w A TTOR NE Y.-

UNITED STATES PATENT canton.

FRANK P. DUNN, OF ANDERSON, INDIANA, ASSIGNOR TO THE ANDERSON TOOL COM-PANY, OF ANDERSON, INDIANA, A CORPORATION OF INDIANA.

Specification of Letters Patent.

Patented Feb. 20, 1912.

Application filed November 13, 1908. Serial No. 462,390.

a'practical computing scale for use by druggists and the like. To thatend I provide a weighing beam .fulcrumed between its nds, preferablyabout midway thereof.

And behind the central portion of said beam a chart and indicator ismounted, and also means actuated by the beam for operating theindicator.

Another feature of said invention consists in'normally weighting one endof said beam so as to hold the load receiver at the other end of saidbeam in its elevated position and also the indicator at zero when thereis no weight.

Alon with the foregoing another feature of the Invention is the.provision of a h0rizontal shaft connected with said beam, preferablycoaxial with the fulcrum thereof, and providing means whereby said shaftwill actuate the indicator, and suspending from said shaft a pendulumweight. Along withthe foregoing is the further idea of so arranging saidpendulum weight that it will be in a truly vertical position when theindicator is about midway of the chart and when the indicator is at zerosaid pendulum weight will be maintained at one side of a vertical linethrough its fulcrum by the 1 same weight that holds the load receiverelevated and the indicator at zero. Also,

said pendulum weight always moves in the same direction as theindicator.

Another feature of the invention consists in the means for transmittingpowerfrom an arm on-said horizontal shaft to the in dicator. The latteris provided with a segmental gear with a series of teeth curvedconcentric with said shaft and pivotally mounted at one end but leftfree to be elevated at'the other end, and a weight acting against saidrack to hold it in engagement with the segmental. gear on the indicator.

This causes the rack to be always held in proper engagement with saidsegmental gear for the accurate actuation thereof and yet it avoidsunusual friction between the rack and gear, the engagement of said partsIn the drawings Figure 1 is a front elevation of the scale. Fig. 2 is acentral verticahsection therethrough onthe line 22 of F g. 1. Fig. 3 isa'horizontal section on the 11116 33 of Fig. 2. Fig. fl is an elevationof the indicator. Fig. 5 is a section on the line 55 of Fig. 2, partsbeing broken away. Fig. 6 is. a section on the line 6 6 of Fig. 2, partsbeing broken away. Fig. 7 is a section on the line 77 of Fig. 2, on

an enlarged scale, .parts being broken away and the parts shown being inthe zero posi- I tion. Fig. 8 is the same showing the device actuated. F1g. 9 is a rear elevation-of the upper part of the casing in which thechart is mounted, the lower part being broken away. I

Fig. 10 is a central vertical section through the device on the line10-10 of Fig. 2, with the front plate of the casing removed and showingthe parts in their unoperated condition. Fig. 11 is the sameshowing theparts in their operated position.

The machine shown herein for the purpose of illustrating the nature ofthis invention is provided with what may be called a foundation 10, abase 11, the lower portion of the casing 12 which is mounted on the rearpart of the base 11 and the upper part of the casing 13 which is acontinuation of the lower part 12 for the purpose of receiving the chartand indicator. On the front part of the base there is a central supportor stand 14 and at each side thereof corresponding stands 15 and 16. Thebase'll may be leveled on the foundation 10 by the leveling screw 17.

On the support or stand 14 there are a pair of oppositely extending arms18 in which the horizontal shaft 19 has bearings. The beam 20 isrigidlysecured to said'shaft At the left hand end of. the beam 20 a.

frame 22 is pivoted with the arm 23 projecting downwardly through theh'pllow stan spider 25 that is secured upon the frame 22 and arm 23.

At the'right hand end of the beam 20 there is a corresponding frame 26pivoted with a corresponding arm 27 extending, downwardly through thehollow stand 16.

At the upper end 27 there is a bowl 12? adapted to contain shot or otheradjustable weight 128 and havinga central upwardly pro ecting bolt on.which the weighted platform 28 is secured, upon which pound and ounceweights may be placed. A bar 29 extends from the rod 23 to thestationary rod 30 secured centrally in the hollow stand or post 14. Thebar 29 is pivoted at each end to said arts and tends to hold the arm 23substantially vertical during the oscillations of the beam 20. There isa similar bar like 29, connecting the rod 30 with the arm 27. Thebars'29 are located in the base 10. This last part of the constructionis in accordance with the usual make of druggists scales.

The front wall of the lower part of the portion 12- of the casing has avertical slot through which the horizontalshaft 19 projects. This slotis closed by a removable plate 36. The inner end of the shaft 19 has aknife-edged bearing at 37 in the stationary vertically disposed bar 38secured against the rear wall of the casing 12. It is immaterial as tothe exact manner of securing the shaft 19 and the beam 20 together,

I so long as the construction is such that the oscillation of the beam20 will cause the oscillation of the shaft 19. On the portion of saidshaft 19which projects into the easing there is secured a pendulumweight 40 that projects through and oscillates in the opening 41 in thetop of the base 11. There is also an arm 42- that projects'up wardlyfrom the shaft 19 so as to be oscillated by said shaft. Herein the parts40 and 42 are shown integral but that is not necessary so lon as theyare arranged so as to be actuated by the shaft 19. There is also an arm44, see Fig. 7 projecting from theshaft 19.

It is integral with the parts 40 and 42 herein but need not be so aslong as the construction is such that it will be actuated-by the shaft19. There is a slot 45in the outer end of the arm 44 through which a pin46 pro jects and said pin is secured in the upper end of the plunger rod47 of the dash-pot 48 that is secured within the casing, forthe purposeof steadying the action of the parts of the scale, as is common inscales.

In the upper part of. the portion 12 of the casing'a horizontallydisposed rectangular bearing bracket 50 is secured. As shown herein thisbracket is .50 secured as to be vertically adjustable, as it is mountedon the 11 per end of the bar 51 that projects upward y from the bar 38and is adjustably mounted therein and held in adjusted position by theset screw 52. 'In said bearing bracket 50 there is a horizontalindicator shaft 55 on which the indicatorv 56 is secured so that itextends upwardly. The in dicator is counter-balanced by the weight 57and it is actuated by the pivoted segment 58 which projects in adirection opposite from the indicator 56 and is secured thereto. Thetoothed segment is fan-shaped and is actuated by a rack 60 that iscurved concentrically with the shaft 19 and is pivoted at one end by thepin 61 to the lateral arm 62 on the upper end of the arm 42. 'The otherend of the rack bar 60 is free to rest and ride upon the pin 63 that ismounted in the lateral arm 64 corresponding with the arm 62 andprojecting oppositely therefrom. The rack bar 60 is held in workingengagement with the segmental rack 58 by the weight 65 on the rod 66that is fulcrumed at 67 in the arm 64 and one end-of said bar bearsagainst the under side of the rack bar" 60 to hold it up against thesegmental gear 58. This construction causes a nice working arrangementbetween the parts 58. and 60 that is comparatively free from frictionand irregularity of operation. It avoids the very accurate workmanshipthat would be required if both ends of the rack bar 60 were stationary.

The upper portion 13 of the casing is fanshaped and has a largefan-shaped front upper row of graduations and numerals 75 f is arrangedto indicate ounces of avoirdupois weight, the chart herein shownindicating sixteen ounces. Below said row of graduations and numerals 75 there is a parallel row 76 which indicates ounces according to troyweight. Below that there is a row 77 which indicates grams according tothe metric system of weights. And below the foregoing there are seriesof graduations and numerals 78 indicating total Y2Llues of articlesaccording to certain prices. per unit of weight, as indicated in thescales 75 and 76. These various rows of graduations and numerals arearranged so as to harmonize and enable a person using this scale toweigh as necessity may demand articles according to avoirdupois weightor the metric system and also indicating the values at certain pricesper unit of weight.

The indicator 56, see Fig. 4, is provided with the usual hair-line 80and with indications 175', 176 and 177 that register with the series ofnumerals and graduations 75,

76 and i? to show whatthe latter series of graduations and numeralsrepresent, namely, avoirdupois ounces, troy ounces and grams. heindicator has also marked on it numerals 178 indicating prices perunitand arranged to register with a series of graduations and numerals78 on the chart. Thus the seal e' bar shows prices from up to $2.40, asherein illustrated. 1

The adjustable mounting of the bearing bracket 50 is in order to bringthe segmental rack 58 and the rack bar 60 into proper cooperatingpositions and also to cause the indications on the indicator 56 tocorrespond and register w th the rows of numerals and graduations on thechart as shown in Fig. 1. The upper end of the indicator 56 is curvedover the upper edge of the chart 72 so to form the end 85, see .Fig. 2,and

indicating numerals 86 that is on the rear surface of the upper part ofthe chart and 'sible through the glass plate 71. These graduations andnumerals 86 correspond exactiy with the weight raduations on the otherside and are to indicate to any person ing behind the machine theavoirduweb ht of the article being weighed.

projects from the shaft 19 in diametrically opposite fromthe 1e pendulumweight and these held in adjusted position-by a and are preferablyarranged as 1 is, so that they will be truly verthe indicator is midwayof the erefor-e. when the indicator is at e through its fulcrum. Thispo- .stlf! shown in Fig. 7. Therefore, when 40 a load is applied theweight 40 yields and moves toward its center of gravity, the effect ofthe weight diminishing as it approaches the center of gravityand itreaches the center of gravitvwhenthe indicator is sub.

' stantially midway of the chart or vertical. A further load causes theweight to swing to the right and its influence on the mechanismwillgradually increase. Thus, it is noticeable that the pendulum weight40 moves in the same direction as the indicator, instead of in theopposite direction, that 1s, when the weight moves to the left, theindicator moves to the left.

It is manifest that the precise details of construction may bevariedwithout departing from the spirit othe invention and that featuresof the invention may be employed without itsadoption as an entirety.

By indicating means in the claims hereof is meant the chart, theindicator, and immediate means for operating the same.

WV at I claim as my invention and desire to secure by Letters Patent is:

' 1. A scale including a beam, a shaft serv move across the series ofgraduations and.

h t!) will-be .to the left of a ing as the fulcrum of said beam,indicatingmeans, an upwardly extending arm secured to said shaft,'connecting means between said arm-and the indicating means, whereby theindicating means is actuated and controlled by said arm, and adownwardly'extending weight secured to the shaft so that it normallymaintains the indicating means at Zero.

2. A scale including a scale beam, a shaft co-axial with the fulcrum andsecured to said beam and oscillated thereby, an indi eating means, meansactuated by the shaft for controllnig the mdicatlng means, a dash pot,an arm secured to said shaft for actuating the dash pot, and a weightsecured to and suspended from said shaft in a direction opposite to theindicator actuating arm and at an angle to the dash-potactuating arm.

3. A scale including a scale beam, a shaft co-axialwith the fulcrum andsecured to said beam and oscillated thereby, an indicating means, meansactuated'by the shaft for controlling the indicating means, a dash pot,a weight secured to and suspended from said shaft in a directionopposite to the indicator actuating arm and at an angle to the dashpotactuating arm, the relative positions of said indicator actuating armand dash pot actuating arm being fixed.

4. A scale including a beam fulcrumed between its ends. a shaft coaxial.with the fulcrum and oscillated by said beam, a weight secured to andsuspended from said shaft, a load-receiving member mounted on one end ofsaid beam, and weighted means on the other end of said beam sufficientto:

counterbalance said load-receiving member and hold said pendulum weightto one side of a Vertical line through its axis.

5(A scale including a beam fulcrumed between its ends, an indicator,oscillatory. means connecting with and actuated bylsaid beam foroperating the indicator, a pendulum weight secured to and suspended fromsaid indicator actuating means, a load-receiving member on one end ofsaid beam, and weighted means onthe other end of said beam sufficient tocounterbalance the loadreceiving member and maintain the indicator atzero and said pendulum weight to one side of a vertical line through itsaxis. 6. A scale including an indicator, a segs mental rack foroscillating the same, arocking arm, a rack bar pivoted at one end andfree at the other end for engaging said seg mental rack, a leverfulcrumed bet-Ween its ends with one end bearing against .sa-idrack barto' hold it in engagement, 2. weight on the other end of said lever,'and load-influenced means for rocking said arm.

a rocking vertically disposed arm, and a rackbar carried by said armthat engages said segmental rack for actuating it.

8. A scale including an indicating means,

a horizontally disposed beam fulcrumed between its ends, a loadreceiving member pivotg lly mounted upon one end of said beam, acounterbalancing weight receiving member pivotally mounted upon theother end of said beam, an upwardly extending arm connected With saidbeam that operates the indicating means, and a downwardly extend- *ingweight connected. with said arm and said beam and arranged normally tomaintain the indicating means at zero and the Weight receiving member inits elevated position.

In Witness whereof, I have hereunto affixed my si nature in the presenceof the Witnesses herein named.

' FRANK P. DUNN. Witnesses:

GRACE M. COSTELLO, BENJAMIN D. MONNEL.

